PLEASE ANSWE

Label friction, conduction, or induction

1. touching a metal sphere with a negatively charged rod
2. moving a negatively charged rod near a metal sphere that is grounded
3. touching a metal sphere with a positive aluminum plate

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

What is the empirical formula for c4h8o2

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy